Sewing-machine.



No. 857,082. PATENTED JUNE l8 1907.

W. T. LINTNER, W. C. ROBBINS & J. P. WEIS.

SEWING MACHINE. APPLIUATION FILED 1330.9,1902.

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PATENTED JUNE 18, 1907.

W. T. LINTNEE, W. G. ROBBINS & J. P. WEIS. SEWING MACHINE.

APPLICATION FILED DEG.9, 1902.

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No. 857,082. PATENTED JUNE 18, 1907. W. T. LINTNER, W. 0. ROBBINS & J. P. WEIS.

SEWING MACHINE. APPLIOATION FILED DEO.9,1902.

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UNITED sTATns PATENT oFFroE.

WILLIAM T. LINTNER AND WILLIS C. ROBBINS, OF MOUNT VERNON, AND JOHN P. WEIS, OF NEIV YORK, N. Y., ASSIGNORS TO THE MANHATTAN MACHINE SUPPLY COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

SEWING-MACHINE.

Specification of Letters Patent.

Patented June 18, 1907.

Application filed December 9, 1902. Serial No. 184,501.

T 0 all whmrt it may concern:

Be it known that we, WILLIAM T. InNTNnu and WVILLIs O. RoBBrNs, citizens of the United States, and residents of Mount Vernon, county of I/Vestchester, State of New York, and JOHN P. Wins, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, county of Kings, and State of New York, have invented a new and useful Improvement in Sewing- Machines, of which the following is a specification.

In the accompanying drawings, Figure 1 is a front view of a machine containing our improvement. Fig. 2 is a plan view with the bracket-arm and the parts carried thereby, above the level of the cloth plate, removed. Fig. 8 is a cutter mechanism detached, showing also the supplemental slide 17 detached from the slide 12. Figs. 4 and 5 are details.

The stitch forming mechanism may be of any suitable construction, one form of which is shown in the drawing, but need not be specifically described herein since it is well known.

1 is the cloth plate containing openings for the sections 2, 3, 4 and 5 of the feed and for the needle 6.

7 and S are two blades constituting, respectively, the shear and knife of a cutter. These are so placed that their cutting edges are behind and substantially in line with section I of the feed and somewhat back of, but to one The shear is separated from section 5 of the feed by a narrow web of metal 9. The shear blade in the construction shown, is set at an inclination so as not to encroach upon the space required for the sewing mechanism beneath the cloth plate. Its cutting edge, however, is horizontal and substantially level with the cloth plate. The knife blade 8 contains the separator -linger 10 the point'of which never rises substantially abovethe level of the shear edge and, therefore, remains constantly in the cut slit of the fabric so that each succeeding cut shall be a true continuation of that slit. In front of said finger is the knife edge proper 11, which extends forward from the finger at an upward inclination and thus produces a drawing cut along the shear edge as its edge descends from a position above the fabric to a position below the same.

distance from the seam.

One feature of our invention consists in mounting the shear and knife blades of the cutter upon a part, such as A, which is separable from the frame and sewing mechanism of the machine, so that the cutter may be bodily removed from or applied to the ma chine while the machine itself is operative 1 with or without the cutter, and the cutter itself is of such stability and strength and is so driven as to be, if necessary, adapted for high speed. To carry out this part of our invention, a cutter frame A is provided consisting essentially of a part a adapted to be secured by screws b to a stationary part such as the cloth plate of the machine; also of an upwardly extending portion 0, d, which provides the bearings for the cutter shaft; also of a downwardly extending portion 0 adapted for holding the shear blade. The holes in this cutter frame for the screws b are slotted so that the cutter frame may be adjusted bodily to trim the material at any desired The part c of the cutter frame not only extends downward from the part a, but also extends laterally therefrom toward the line of feed, and the upper surface f of the part is substantially level with the surface of the cloth plate; or, in other words, substantially level with the lower surface of the part a. The part 0 thus constitutes a support in connection with the cloth plate for that portion of the fabric which is removed by the cutter. Thesurface 9 of the part c which faces the feed is preferably vertical so as to be capable of adjustment close up to the feed bar. A dovetailed groove is formed in this surface to adjustably receive the shear blade 7 which is clamped in such groove by the aid of the set screw 7L. An under cut groove i is formed in the part a to constitute a portion of the guideway for one side of the slide 12.

The stock for the knife blade 8 consists of a projection toward the feed from the rocker arm 7. fixed to the end of the cutter shaft 1. The knife is adjustably fixed in a dovetailed groove of this stock wherein it is clamped by a set screw m. The bearings for the cutter shaft in the parts (2, d, of the cutter frame are lubricated through the wick containing holes a. 0 is an eccentric on the main shaft p of the machine which is operatively connected to rock the cutter shaft Z through the link q and arm 1" which are detachably coupled together by a coupling pin .9. The link q can bereadily detached from the eccentric by the removal of the cap t, shown in Fig. 3.

The opposite edges 14 and 15 of the slide 12 fit in a dovetailed groove of the cloth plate, but the edge 16, as already stated, fits in an under cut groove i of the cutter frame. The slide 12 is made of the L form shown to make space for the upper portion of the part e of the cutter frame. In the upper surface of the slide 12 is formed a groove into which fits a supplemental slide 17. This groove, as shown in Fig. 5, gradually deepens toward its forward end so that the forward end of the supplemental. slide 17 is susceptible of being sprung slightly downward under the pressure of the knife 8, as shown in Fig. 5. The supplemental slide 17 receives the set screw 18 through a slot so that it may be fixed by said set screw in any position of forward adjustment which is necessary to place its forward edge substantially against the side of the shear 7, as shown in Fig. 5. An arm 13 projecting from the cutter frame A carries a pin 19, the forward end of which is, by the spring 20, pressed into a hole in the supplemental slide 17, so that when the binding screw 18 is loosened any adjustment of the cutter frame will carry the supplemental slide 17 with it. This insures that at whatever distance the cut may be made from the seam, the supplemental slide 17 will always close up the opening around the knife 8 so closely as to prevent as much as possible the forcing or dropping of lint below the level of the cloth plate. It will thus be seen that the support of the cloth to the right of the line of cut is shared between the cloth plate,

the slide 12-, the supplemental slide 17 and the surfacef of projection e.

The various parts of the cutter frame A are preferably made integral from metal of sufficient strength to avoid vibration when running at high speed.

Although we have described the mounting of the two members of the cutter upon a frame separable from the machine proper as one feature of our invention, we wish to be understood as setting forth in this description and in the accompanying claims, other features of our invention. Moreover, we do not wish to be understood as limiting ourselves to the particular form or construction herein described since we are aware that it may be departed from to a greater or less extent without departing from the principle of the several parts of our invention.

e claim 1. The combination with a sewing machine, of a cutter attachment therefor comprising a cutter frame containing a means of attachment to the sewing machine proper, extensions above and below said means of attachment, a movable cutter member se cured to the extension above the attachment, a stationary cutter secured to the extension below the attachment, said cutter frame furnishing a portion of the cloth support, and a movable lint shield furnishing another portion of the cloth support.

2. The combination with a sewing machine, of a cutting attachment therefor comprising a frame, a movable cutter carried by an upper portion of said frame, a downwardly and laterally extending member se cured to said frame, a cutter carried by the lateral portion of the member, a horizontally disposed'slide adjacent to the downwardly extending portion of the member, and a lint shield movably superposed upon said slide.

In testimony whereof, we have signed our names to this specification in the presence of two subscribing witnesses.

WILLIAM T. LINTNER.

WILLIS C. ROBBINS JOHN P. WVEIS. Witnesses:

EUGENE N. ROBINSON, WVALTER A. PAULING. 

